Kalph s



R. s. MERSHON.

lWatch Regulator.

No, 23,810. Patented April l26, 1859.

UNITED STATES PATENT FFTCE.

RALPH S. MERSHON, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO HIMSELF AND JOHN M. HARPER, OF SAME PLACE.

REGULATOR FOR TIMEKEEPERS.

Specification forming part of Letters Patent No. 523,810, dated April 26, 1859; Ressued February '7, 1860. No. 892.

To all whom t may concern:

Be it known -that I, RALPH S. MERSHON, of Philadelphia, in the county of Philadelphia and State otl Pennsylvania, have invented certain new and useful improvements in Timepieces; and l do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawing, in which- Figure l, represents a top view of a time piece. Eig. 2 represents a detached view ot the compound regulator on an enlarged scale.

The nature of my invention consists in the application to vwatches or such other time pieces, as have their beats or vibrations governed by a balance and hair spring' of a compound regulator, composed ot two or more movable toothed segments by means ot which the least sensible elt'ect can be produced upon the hair spring while the construction of this compound regulator is such that it may also be used as a simple regulator for the purpose ot producing a greater etfeet upon the hair spring.

To enable others skilled in the ait to make and use my invention, l will proceed to describe its construction and operation.

A, represents the pillar plate of a watch moveii'xent.

i3, represents the upper plate.

C, represents a toothed segment movable upon the shaft cf, which is held by the balance bridge T.

D, represents the regulator, which turns its bearing at o. lt has upon its hub two or more teeth c, which mesh into the teeth of the toothed segment C.

G, represents the balance, H, the balance or hair spring'.

L, represents a scale by which the regulator D, is adjusted, and which I call the greater scale.

m, represents a scale on the movable segment C, which l call the lesser scale, the degrees ot which are indicated by the stationary point d, of the plate m.

The operation of this movement is as tollows: lt' the regulator D, be turned upon its pivot toward F, the segment C, =will turn in an opposite direction and the scale m, will have moved along in frontv of the stationary point 1]. lt the distance ot' the teeth C, and the scale L, from the center 7), be respectively as l to T, then the arc C, will move one seventh of the movement indicated by the regulator D, upon the scale L, and as the tension of the balance spring is adjusted b v the action ot the pin g, upon it, and as the pin g, is secured at a distance from the point a, which is equal to one halt ot the radius ot' the segment C, it follows that at the movement of the regulator D, upon the scale L. the balance spring is attected to only one fourteenth ot said movement, thus atlording the means ot' adjusting the spring to almost any desired accuracy. By turning the regulator D, to the point S. the two teeth c, ot said regulator will have passed beyond and ceased to control the toothed segment TC, and the latter can now be turned independently and like a simple regulator, the point r?, indicating the degrees on the scale m, thus a tt'ording the means of adjusting the balance spring for large adjustments, without recurring to the necessity of shortening the spring, as would be the case if the compound regulator only could be used.

Having thus t'ully described the nature of my invention, what l claim therein as new, and desire to secure by Letters Patent, is:-

l. The application to watches, and such time pieces as have their vibrations governed by a balance and hair spring ot a compound regulator composed of two or more movable segments constructed and operating substantially as described.

Q. i also claim the combination ot' said compound regulator with a greater and lesser scale, the former ixed and the latter movable, but having a fixed indicator, and capable of being operated either in concert with or independently of each other, substantially as herein described.

R. S. MERSFON.

Titnesses z Lures L. VHEELER, JOHN Mannen, J r. 

